Light Up Jellyfish Costume Tutorial

Halloween is fast approaching and thoughts in our house are turning towards costumes.  Last year we were soaked in the rain halfway round trick-or-treating so I thought it would be cool to incorporate an umbrella into the Halloween costume.  So we decided on jellyfish! But the boys love the jellyfish that light up and glow in the dark, so we changed the idea slightly to add in lights too.


DIY Halloween costume

You Will Need:

Clear umbrella (I bought a cheap one from Amazon)

String of battery powered LED lights (another cheap Amazon purchase)







  • First tape the battery pack to the stem of the umbrella and tape the lights in a spiral around the inside of the umbrella.

halloween costume

  • Next make small holes around the bottom of the clear plastic, but not too near the edge.  Cut lengths of ribbons to tie in the holes and dangle down for tentacles.

jellyfish costume

  • Cut out two white eyes from paper and draw/colour in the iris.
  • Switch on the lights and ta-da! One light up jellyfish costume!  My boys will be wearing dark colours on Halloween so you can’t see them so well in the dark and the jellyfish takes centre stage.

halloween costume diy

  • The LED lights are perfect for Christmas too, so don’t forget to upcycle the costume for the next season!

DIY sea costume

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  1. September 14, 2017 / 11:19 am

    I love this costume so much! If my eldest has to dress up for halloween for school this year I am definitely making this for her!

  2. August 24, 2018 / 9:17 pm

    This is a fab and cheap idea! I bet it will look great when it gets dark outside! However, I can’t believe we are talking about Halloween already ?

    • August 25, 2018 / 7:38 pm

      Ha ha! It is quite early isn’t it! But still, takes time to make the costume!

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